THOMSON TSC 800 - V2.2 User Manual

TSC 800 TRANSFER SWITCH CONTROLLER
PM 049 REV 10 08/09/25 Thomson Technology
77
11. TROUBLESHOOTING
A number of problems can cause the TSC 800 controller not to function properly. Refer to the
following list of typical problems. Consult the factory for any detailed information or for any problems
not listed.
CAUTION!!!
Before opening the enclosure to perform any service task, it is imperative to isolate the
transfer switch from any possible source of power. Failure to do so may result in serious
personal injury or death due to electrical shock.
Service procedures must be undertaken by qualified personnel only!
Symptom Possible Causes
*
Will not re-transfer to utility source
upon restoration
- A test mode has been activated (check TSC 800 status LCD
display)
- Utility voltage or frequency is outside the pre-programmed
limits (check utility source for adequate voltage & frequency)
- A loose control connection
- Faulty contactor auxiliary contact
- Defective utility contactor coil
- Defective TSC 800 controller (verify output signals with
circuit board mounted diagnostic LED’s)
- TSC 800 has “Transfer Fail” alarm activated (if programmed
as “Force Transfer). Determine cause of alarm and rectify
before TSC 800 is reset
- Bad limit or auxiliary switch N/C contact or loose wire
termination between the controller and the limit switch
- TSC 800 programmed for manual retransfer. Press Lamp
test to initiate retransfer to Utility Source.
- A phase unbalance condition was detected on the Utility
supply while on load. The condition may not be readily
noticeable with no load on the source. Confirm voltage
unbalance condition by viewing alarm state on TSC 800
LCD. In this state the load is locked to the generator until
the TSC 800 is reset.
-
Will not transfer to generator
source upon failure of utility
source
- Generator set not producing enough voltage/frequency or
local generator output circuit breaker open (outside
programmed limits of TSC 800)
- Warm up time delay function has not timed out yet (verify
TSC 800 timer setting, 0 -3000 seconds programmable)
- A loose control wire connection
- Faulty contactor auxiliary contact
- Defective generator contactor coil
- Defective TSC 800 controller (verify output signals with
circuit board mounted diagnostic LED’s) and AC voltage at
appropriate TSC 800 controller terminal
- TSC 800 has “Transfer Fail” alarm activated (if programmed
as “Force Transfer). Determine cause of alarm and rectify
before TSC 800 is reset
- Bad limit or auxiliary switch N/C contact or loose wire
termination between the controller and the limit switch
- A phase unbalance condition was detected on the
Generator supply prior to or while on load. The condition
may not be readily noticeable with no load on the source. .

THOMSON TSC 800 - V2.2 Specifications

General

Brand	THOMSON
Model	TSC 800 - V2.2
Category	Controller
Language	English